**T/O: Number of B-17s that took off on the mission.
NE - Non-Effective Sorties: Number of B-17s that had abortive or abortive sorties missions or failed to drop bombs properly. The " * " after some indicates B-17s that did not abort the mission but dropped no bombs after reaching the target or failed to find and bomb the target are included. Most, but not all, of these B-17s brought their bombs back to Molesworth.
Lost: Number of B-17s that were lost over enemy territory, that ditched, that were abandoned in air over friendly territory or in the U.K. or that made emergency crash landings in friendly territory or the U.K. and were salvaged.